Definition of instability in English:

instability

Syllabification: in·sta·bil·i·ty
Pronunciation: /ˌinstəˈbilitē
 
/

noun (plural instabilities)

Origin

late Middle English: from French instabilité, from Latin instabilitas, from instabilis, from in- 'not' + stabilis (see stable1).

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Word of the day skosh
Pronunciation: skōSH
noun
a small amount; a little